Dry shaving instrument



Jan. 9, 1940. Rf E, BENNERI 2,186,093

DRY SHAVING INSTRUMENT Fil'ed Nov. I0, 1957 3 Sheets-Sheet l FIG.3.

INVENTOR. RUSSELL E .BENNER- Jan. 9, 1940. A R, E, BENNER 2,186,093 v DRY SHAVING INSTRUMENT RUSSELL BEEN-NER.

ATTOR EY.

Jan. 9,

R. E. BENNERV DRY sHAvING INSTRUMENT Filed Nov. 1 0. 19371.

5 Sheets-Sheet 3 Flan.

\\\\\\TT' INVENTOR. RUSSELL LBENNER.

Patented Jan. 9, 1940 l UNITED STATES DRY SHAVING INSTRUMENT y Russell E.

Benner, New York, N. Y., assignor, by

mesnc assignments, to Remington Randlnc., Buiialo, N. Y., a corporation oi Delaware Application November 10, 1937, Serial No. 113,795

13 Claims.

This invention relates to improvements on electric dry Shavers of a type well known in the art, particularly to a device for disengaging the inner cutter separably from the outer cutter.

Electric dry shavers now in commercial use provide a shearing head with an inner cutter so mounted that it is rather diilicult and tedious to remove. According to the teaching of the prior art, this object is achieved primarily by disengaging the entire shearing head from the motor casing- 1 It is the main purpose of this invention to -avoid this difliculty and to afford a simple and inexpensive means -for disengaging the inner from the outer cutter without first removing'the entire shearing head fromv its motor casing.

One of the objects of this invention is to provide an improvement in electric dry shaver-s that affords a quick and simple means for detaching the inner from the outer cutter for cleaning purposes.

A further object of this invention is to provide' resilient means in dry Shavers of the well known type described whereby the inner cutter may be disengaged from the outer cutter while the latter still remains secured to the motor casing.

Another object of this invention is to provide detachable finger devices, easy to operate, affording a time saving means for removing the inner cutter of dry shavers well known in the art.

Other objects will appear from a full and detailed description of the drawings attached to this specification.

This invention resides in the combination, construction, arrangement and relative 'location of parts, all as will be described in detail in the following specification in connection with thev drawings, in which:

Fig. 1 represents a fragmentary end elevational view of the device embodying this invention.

Fig. 2 is an end elevational view partly in cross section, revealing a portion of the casing with parts thereof broken away. r p Fig. 3 is a sectional view of the device taken substantially along line 3-3 of Fig. -2.

Fig. 4 is a view of the device substantially similar to that in Fig. 3 but showing the inner cutter partially removed.

Fig. 5 is a sectional vie-W of the device taken l substantially along line 5 5 of Fig. 3.

Fig. 6 is a cross sectional view of a modified form of the device.

Fig. 'I is a cross sectional view of the same modified device taken substantially along line portion I3. Two levers, I5 and I6, are pivoted 1-1 of Fig. 8 showing the inner cutter .partly removed and parts thereof broken away.

Fig. 8 is a cross sectional View of the modified device taken substantially along line 8-8 of Fig. 6. f

Fig. 9 is a cross sectional view of 'the modified device taken substantially alongv line 9-9 of Fig. 6.

Fig. 10 is an end elevational view of another modified form of the invention herein. .v

Fig. 11 is a cross sectional view thereof taken `substantially along line II-II of Fig. 10.

Fig. 12 is a cross sectional view thereof taken substantially along line I2-I-2 of Fig. 11.

Fig. 13 is a view substantially like that shown in Fig. 11 but with the inner cutter partly rel5 moved and parts thereof broken away.

Fig. 14 is a cross sectional view taken substantially along-line Ill-I4 'of Fig. 11.

Like reference' characters refer to like parts in all the drawings. 20

Referring to the drawings in detail, and particularly to Figs. 21 to 5' inclusive, a fragmentary part of an electric dry shaver well known in the art' is shown, of which III is the motor casing and handle, II is the fixed outer cutter and I2 is the reciprocating inner cutter.

In Fig. 2 the motor casing I0 is broken away to reveal part of a motor well known in the art and only so much as is necessary to disclose the operativeness of the device covered by this invention. A part of the drive shaft is shown, at the outer end of which is' a knurled thumb wheel I4. Between the wheel I4 (Fig. 2) and the motor the'shaft is formed with an eccentric crank to the motor casing I0 `by a common pivot pin I1, one of which I5 has both its extremities forked. `Lever I6 has only its lower extremity forked and is provided with an elongated slot I 6 which engages the pivot Il. The lower forked end of lever lI5 straddles and engages the crank I3. The upper forked end of lever I5 straddles and engages the upper lever I6 at a point slightly above pivot pin I1. The forked extremity of lever I6 straddles and engages the lowerv lever I5 at a point slightly below pivot pin I1. Near the upper end of the lever I6 are a pair of shoulders I8. I9 represents a spring member, the upper end of which is secured to the lever I 6 at a point slightly below ,the shoulders I 8 whilethe lower end of said spring member I8 is secured to the pivot pin I1 by the screw I1f. Theupper lever I6 extends through a rectangular opening 20 on the extreme end of casing III. On each side of levers I5 and I6, are the spring-pressed pins 2|. The

lower extremities oi' the .pins 2| are supported by a plate 22. On each of the pins 2| is a collar 23 againstlwhich springs bear to elevate the pins. Beyond the shoulders 23, each of. the pins 2l is of a diameter larger than the lower part thereof but not as large as the collar 23. Near the top of each of said pins 2 I, the wider portion thereof narrows down to adiameter approximating that of the lower portion of the pins, making virtually another pair of shoulders 24. The pins 2|",held securefwithin the casing I0 by the shoulders 23, extend through apertures 25 in the extreme upper part of casing III. 25' represents a large rectangular groove into which the fixed outer cutter II is removably secured. On each end ofthe casing IIJ are cut-out portions 26. y

A detaching device 21 (Fig. 5) is made ofa suitable piece of metal and is partly rectangular in shape with an ear 28 projecting outward on each end thereof, which ears are curved downward at their extreme ends to form finger grips 29. In the rectangular part of the detaching device 21 are three rectangular slots. The central slot 30 has clearance enough to permit the upper lever I6 to oscillatetherein though small enough to serve as a stop for the shoulders I8 of lever I6. The other two slots 3| have clearance enough for the narrow ends ofpins 2| to move up and down therein though small enough to serve as a stop for shoulders 24 at the top of pins 2|.

The xed outer cutter II has extending through the central portion of its base a rectangular slot 32, through which the upper end of lever I6 extends to engage the inner cutter I2.

On each side of the slots 32 are openings 33 through which the pins 2| extend. 'Ihe base of said cutter I I has a cut-in portion corresponding in shape and size to that of the detaching device 21. The end walls of the base of said outer cutter II have out out portions 33 corresponding to cut-outs 26 on the casing I0.

The inner cutter has a rectangular groove 34 which engages lever I6 and on each side of said groove 34 are provideda pair of cut-ins 35 to receive the pins 2|.

In the operation of the device as shown in Figures 1 to 5 inclusive, the detaching device 21 is placed in the rectangular groove 25' of the casing I0 so that the pins 2| extend through the slots 3l and the lever I6 extends through slot 30. Then the inner cutter I2 is mounted within the outer cutter II and both together are fastened securely'in the rectangular groove 25 above said ,detaching device 21. By twirling the knurled thumb wheel I4, the motor is started and lever I5 is given a rocking movement by means of 4the eccentric I3. 'I'his rocking movement is communicated by lever I5 to lever I6 which is slidably adjusted to lever I5. Lever I6 then by eno gagement with the inner cutter I2 causes the said inner cutter to reciprocate.

By gripping the ilnger grips 29 with the thumb and forefinger and bearing down on them, slots 3| acting as stops for the shoulders 24 near the top of the pins 2| and slot 3|) acting as a stop for the shoulders I8 of lever I6 depressthe pins 2| against their respective springs and lever I6 from the positions in which they are shown in Fig. 3 to the position as shown in Fig. 4. Lever I6,

being slidably mounted on lever I5, and pivot I1 as hereinbefore more fully described, is depressed against the action of spring member I9. In the position shown in Fig. 4, the pins 2| and lever I6 are released from their engagement with cut-` ins 35 and grooye 34 respectively of the inner outer cutter II.

cutter, and the inner cutter is then free to be removed either while the motor is in operation or not.

Therefore, the advantage of this device is that it enables the operator to remove the inner cutter 5 for cleaning purposes without first having to remove the xed outer cutter, thereby saving the operator a great waste of time and energy.

Figs. 6 to 9, inclusive represent a modied form of the same device, which differs from the de- 10 Vice shown in Figs. l to 5,*incl`usive, only in the structure of the detaching device 21 and of the In the said modified form, detaching device 21 has a set of projections 36 on each of the longitudinal sides thereof, the said 15 projections being obliquely disposed. 'I'he said outer cutter II has a set of oblique cut-outs 31 on eachof the longitudinal sides near the base thereof.

lIn the operation of this modified device, a fln- 20 ger grip 29 extending to the left as shown in Fig. 6 is pushed in. As this is done, the projections 36 engaging the cut-outs 31 cam the device 21 down whereby the slots 3|' which act as stops for shoulders 24 near the top of pins 2| and slot 30 25 which acts as a stop for shoulders I8 of lever I6 force pins 2| and lever I6 to the position shown in Fig. '1. In this position the inner cutter I2 is then free to be disengaged from the outer cutter II. 30

Figs. 10 to 14 inclusive, represent still another modified form of the same device. The motor driven shaft I3 extends in the direction of the longitudinal axis and has an eccentric cam I3' on its extreme upper end. Pins 2| are normal in 35 shape and have but one pair of shoulders instead of the two pairs as shown in Figs. l to 9, inclusive.

Positioned beneath the detaching device 21 is a plate 21' having two projections 2|' resembling the ends of the usual spring-pressed pins. Between the said projections 2| and inv the center of said plate 21 is a projection I6' resembling the end of the upper lever I6. Thelower end of projection I6 extends below the plate 21', in the center thereof, and is formed with a forked 45 shaped projection 36'. The lower ends of projections 2|' are provided with cut-outs 35.

In operation, plate 21' is placed in the rectangular groove 25 so that the 'pins 2| engage the cut-outs 35 and eccentric I3 engages projection 36 leaving clearance sufcient for its 50 slidable action up and down on the said cam I3'. Then detaching device 21 is placed over plate 21 so that projections I6' and 2|' extend through the slots therein and engage and groove 34 and cut-outs 35 respectively of the inner cutter.

By bearing down on the nger grips 29 with the thumb and forenger, the pins 2| are forced down by projections 2|' and projection 36 slides down- Ward on cam I3', thereby disengaging the' pro- 60 jections from the inner cutter which is then free to be removed. A

While I have described what I consider to be a highly desirable embodiment of my invention, it is obvious that many changes in form could be 65 made without departing from the spirit of my invention, and I, therefore, do not limit myself to the exact form herein shown and described, nor to anything less than'the whole of my invention as hereinbefore set forth, and as hereinafter 70 claimed.

What I claim as new, and desire to secure by Letters Patent, is:

1. A dry shaving implement of the type described, comprising a grip-handle enclosing a 1l motor arock lever formed of an upper and lower member, said upper member'H being slidably mounted on and resiliently secured to said lower member, a pivot for said lower member,l an elongated slot `in `said upper member engaging said pivot, resilientv pins, shoulders on said upper member and pins, a fixed outer cutter having a recess formed in the base thereof, an innercutter mounted in said outer cutter and adaptedtobe engaged by said/'pins and reciprocated by said upper member, and a detaching, device removably sec'ured to said grip-handle and positioned in said recess, said device being adapted to engage said shoulders to disengage said upper arm and pins from said inner cutter thereby permitting the removal of said inner cutter from said outer cutter.

2. A dry shaving implement of the type described, comprising a grip-handle enclosing a motor, a rock lever driven by said motor and formed of an upper and lower member, said upper member being slidably mounted on and resiliently secured to said lower member, ar pivot for said rock lever, resilient pins, shoulders on said upper member and pins, a fixed cutter, an inner cutter mounted in said outer cutter and adapted to be engaged by said pins and reciprocated by said rock lever, and a detaching device removably secured to said grip-handle said device being adapted to engage said shoulders to depress said ,upper arm and pins thereby permitting the removal of said inner cutter from said fixed cutter.

3. A dry shaving implement of the type described, comprising a grip-handle enclosing a motor, a rock lever formed of a resiliently connected upper and lower member, a pivot for said lower member, an elongated slot in said upper member engaging said pivot,

Y cutter, an inner cutter mounted in said outer cutter and adapted to be engaged byA said pins and reciprocated by said rock lever, and a detaching device removably secured to said griphandle, said upper arm and pins being adapted to be depressed by said device to permit the removal of said inner cutter from said fixed outer cutter.

4. A dry shaving implement of the type described, comprising a grip-handle enclosing a motor, a "rock lever actuated by said motor and formed of an upper and lower member, said upper member being slidably mounted on Isaid lower member, a pivot for said lower member, an elongated slot in said upper member engaging said pivot, a spring member resiliently connecting said upper member and said pivot, resilient pins,

shoulders on said upper member and pins, anv

outer cutter having a recess formed in the base thereof, an inner cutter mounted in said outer cutter and adapted to be engaged by said pins and reciprocated by said upper member, and a detaching device removably secured to said griphandle and positioned in said recess said device being adapted to engage said shoulders to disengage said upper arm and ting the removal of said inner cutter from said outer cutter.

5. In a dry shaver, a motor, a reciprocating arm actuated by said motor, a xed outer cutter, a reciprocating cutter positioned in said fixed cutter and reciprocated by said arm, resilient pins for retaining said reciprocating cutter in said fixed cutter and means comprising a plate for disengaging said pins and arm from said reciprocating cutter to permit removal thereof from said outer cutter.

resilient pins, a-iixed outer pins thereby permit- 6. Ina dry shaver, an inner reciprocating cutter positioned within an outer fixed cutter, driv ing and positioning means for said inner cutter and means `comprising a plate for disengaging said driving and positioning means from said inner cutter to permit removal thereof from said flxed cutter.

7. In a dry shaver of the type described, the

combination comprising' a motor casing and handie, a rock lever having an upper member slidably and resiliently mounted upon a lower member, spring-pressed plungers, an inner and an outer cutter head, anda detachingdevice removably secured tothe top ofsaid motor casing and beneath said cutter heads affording means to disengage said upper member and plungers from the inner cutter. k

8. A dry shaver comprising a motor casingand grip-handle, an outer cutter fixed to said casing, an inner cutter reciprocally mounted within said outer cutter, a rock lever comprising a lower member and. upper member slidably mounted thereon and spring-pressed plungers engaging said inner cutter and means comprising a plate for disengaging said upper member and spring pressed plungers from said inner cutter to permit removal thereof fromsaid outer cutter.

9. In a, dry shaver, the combination of a motor casing, a rotatable shaft extending in the direction of the longitudinal axis of said' motor casing, an eccentric cam on the upper -extreme end of said shaft; a plate removably secured to Ithe top of said motor casing, having pin shaped projections on each end of its upper face and a lever shaped projection between them, and also having a forked shaped projection on the reverse face in the center thereof, the said forked projection engaging said eccentric cam; a detaching device removably secured to said plate, and having slots through which the projections of said plate extend; a fixed outerv cutter having a groove on its base to lengage said detachingdevice; an inner cutter reciprocally mounted within the lfixed outer cutter and having engagement with the projections on said plate; and finger grips on said detaching device providing means for4 operating said detaching device to disengage the inner vcutter from the outer cutter.

-10. In a dry shaver, the combination of a motor casing, a rotatable shaft 'extending in the direction of the longitudinal axis of said motor casing, an eccentric cam on the upper extreme end of said shaft; a plate removably secured to the top of said motor casing, having pin shaped projections on each end of its upper face and a lever shaped projection between them, and lalso having a forked shaped projection on the reverse face in the center thereof, the said forked projection engaging said eccentric cam; a detaching device removably secured to said plate, and having slots through which the projections of said plate extend; a fixed outer cutter having a groove on its base to engage said detaching device; an inner cutter reciprocally mounted within said fixed outer cutter and having engagement with the projections on said plate; and nger grips on said detaching device providing means for actuating said detaching device to permit disengagement of lever shaped projection between them, and also having a forked shaped projection on the reverse face in the center thereof, the said forked projection engaging said eccentric cam; an outer cutter and an inner cutter, and means removably secured to said plate for disensasing the inner cutter from said lever and pin projections.

12. A dry4 shaving implement of the type described, comprising a grip-handle enclosing a motor, a cutting head removably secured to said handle, said head comprising a iixed cutter having a reciprocating cutter positioned therein, reciprocating means and resilient positioning means for said inner cutter, said reciprocating means being formed of an upper and lower member, and1 detaching means adapted to depress the upper member of said reciprocating means and said pol 2,186,008 projections on each end of its upper face and a sitioning means out of engagement with said inner cutter to permit withdrawal thereof from said cutting head.

13. A dry shaving implement of the type described, comprising a grip-handle enclosing a motor, a cutting head removably lsecured to said handle, said head comprising a fixed cutter having a reciprocating cutter positioned therein, re-

ciprocating -means and resilient positioning means for said inner cutter, cam faces cut in the lower edge of said xed cutter, and a detaching means comprising a plate having ears thereon aligned with said cam faces, said .plate being adapted to disengage said reciprocating and positioning means from said inner cutter by the cooperation of said cam faces and ears during l5 lateral movement of said plate.

RUSSELL E. BEINER. 

